| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a yellowing-free soft polyurethane foam. <P>SOLUTION: In a method for producing a soft polyurethane foam by subjecting an organic polyisocyanate (A), a polyol (B), a catalyst (C), a foaming agent (D) and a foam stabilizer (E) to reaction, foaming and curing, the organic polyisocyanate component (A) uses the mixture of an allophanate group-containing organic polyisocyanate composition (A1) comprising a monool and an aliphatic and/or alicyclic diisocyanate, an allophanate group-containing organic polyisocyanate composition (A2) comprising a hydroxyl group-containing compound containing two or more hydroxyl groups and an aliphatic and/or alicyclic diisocyanate, and an organic polyisocyanate compound (A3) obtained by reacting an aliphatic and/or alicyclic diisocyanate with a polyol component (a1). <P>COPYRIGHT: (C)2013,JPO&INPIT |
